diff --git a/docs/datanommer_datagrepper/index.rst b/docs/datanommer_datagrepper/index.rst
index 4bd6e09..0d879a6 100644
--- a/docs/datanommer_datagrepper/index.rst
+++ b/docs/datanommer_datagrepper/index.rst
@@ -7,7 +7,11 @@ Datanommer
 * Reads-in messages from the bus
 * Stores them into the database
 
-:ref:`datanommer`
+.. toctree::
+    :maxdepth: 1
+
+    datanommer
+
 
 Datagrepper
 -----------
@@ -16,8 +20,8 @@ Datagrepper
   capacity
 
 
-Ideas box
----------
+Investigation
+-------------
 
 Here is the list of ideas/things we looked at:
 
@@ -27,3 +31,4 @@ Here is the list of ideas/things we looked at:
     pg_stat_statements
     pg_partitioning
     pg_timescaledb
+    pg_array_column_postgrest